Work vehicles

Abstract

To provide a work vehicle equipped with a battery system that can start the battery system more quickly and reliably, depending on the worker's purpose. [Solution] The battery consists of a high-voltage battery and a low-voltage battery. The controller is configured to select and execute multiple operating modes for different work purposes. After startup, it accepts the operator's selection of an operating mode and executes a startup process corresponding to the selected operating mode. The operation mode and charging mode are started after the controller has started up, provided that pre-charging, which involves supplying power from the high-voltage battery to charge the capacitor, has been successfully completed. The maintenance mode is started immediately after the controller has started up.

Claims

1. A work vehicle capable of driving its wheels and work implements by power supply from a battery, The system comprises a travel motor for driving the travel wheels, a motor for driving the work implement, a controller for controlling the driving of the travel motor and the work implement motor, a capacitor for supplying power to start the drive to the travel motor and the work implement motor, and a BMS for controlling the power supply to the battery. The aforementioned battery consists of a high-voltage battery and a low-voltage battery. A high-voltage system circuit including a circuit that supplies power from the high-voltage battery to the capacitor, The battery system includes a low-voltage circuit that includes a circuit for supplying power from the low-voltage battery to the controller, The controller is configured to be able to select and execute multiple operating modes with different work purposes, and after startup, it is configured to accept the selection of the operating mode from the operator and execute a startup process according to the selected operating mode. The aforementioned operating modes include a driving mode for operating the work vehicle, a charging mode for charging the battery, and a maintenance mode for maintaining the work vehicle. A work vehicle characterized in that the aforementioned driving mode and charging mode are initiated after the controller is started and pre-charging, which involves supplying power from the high-voltage battery to charge the capacitor, is successfully completed, and the maintenance mode is initiated immediately after the controller is started.

2. The aforementioned operating mode and the aforementioned maintenance mode are initiated upon further confirmation that the connection of the battery charging cable has not been detected. The work vehicle according to claim 1, characterized in that the charging mode is configured to be initiated upon further determination that the connection of the battery charging cable has been detected.

3. The work vehicle according to claim 2, characterized in that the charging mode is initiated after the controller has determined that pre-charging for charging the capacitor has been successfully completed and that the voltage converter for converting the voltage so that the low-voltage battery can be charged by the power of the high-voltage battery is operating correctly, and after activating the on-board charger that charges the battery from the charging cable.

Images